Another is reading e-book.I like doing it because sometimes I can relate to the stories I read and it thrills me.
Last one is vandalizing.Sometimes, when I get bored, I spent some of my papers just becuase of vandalizing. I find it fun even I just draw circle or any other nonsense writings.
Reference for the background images:
https://play.google.com/store/apps/details?id=jim.britain.calligraphy